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Interannual pollinator sharing

Jakub Štenc

Intro

  • But what does it mean for pollen transfer?

Methods - the locality

Czech Republic

Rich in flowers

  • 15 years of data collection (2011-2025)

Methods - permanent plots

plots are marked

recovered every year

93 plots in total (+ 10 “edges”)

Methods - plant-pollinator survey

Plant survey

Pollinator survey

Methods - plant survey

  • 4 x 4 meter squares
  • divided to 64 0.5 x 0.5 subplots
  • Stalks of flowering plants are counted or scored presence/absence in subplots
  • 2 times per sampling period
  • Data needs to be integrated together - plot or subplot level?

Methods - pollinator survey

  • “Snapshot” of plant-pollinator interaction
  • = all interactions recorded, every flower unit observed once per sampling
  • 20+ sampling per plot per year
  • Correction for sampling effort
  • 14 000/80 000 entries needs to be checked

Pollinator sharing among plants

Annual variation in pollinator sharing

Diurnal variation in pollinator sharing

Pollen availability during the day

Pollen transfer during the day

Pollen deposition

Pollen deposition

Interannual dynamics - Questions

  • Is pollinator sharing between pairs of plant species stable over years?

  • Which pair of plants are stable and which ones are variable over years?

  • Can we identify stable modules within the network?

  • How much is pollinator sharing driven by changes in plant abundances and how much by other factors (which ones?)

Pollen deposition - questions

  • Does longer exposition of stigma leads to higher deposition than necessary for seed development?

  • Can longevity serve as mechanism to allow accumulation of pollen?

  • Does longer exposition leads to higher proportion of HP?

Progress?

So far not so much

The plan

  • - to clean the data and prepare the data sets for analysis (in progress)

  • - make a package for repeated analyses

  • - analyse the stability of pollinator sharing

  • - write down the MS - draft around Christmass

Data cleaning

  • Plant abundances - now facing the cleaning and decision-making

  • Plant-pollinator interactions - 29th of September another meeting (11% to be solved)

  • Support data - coordinates, climatic data, traits data

HanPolNet package

  • One package to rule all the data - including support data

  • Fully available at Github

  • First step: the structure

  • I started yesterday

Analysis

Analysis

  • Interested in seeing stability of

    • plant species abundance

    • plant distribution patterns

    • plant-pollinator interactions

    • pollinator sharing between plant species

SCAPE 2025

  • data for pollinator sharing of one plant species

  • Data for pollen transfer to that one species from others

  • Developing the idea on it

  • Using it to test my package functionality